| |
Report: Environmental Flow Needs Determination, Nicomekl-Serpentine Watersheds, Lower Mainland B.C.
| Report Documents
|
|
|
| |
| Map Plotfiles
|
-
No files of this type available
|
| |
| Data Files
|
-
No files of this type available
|
| |
| Digital Map Files
|
-
No files of this type available
|
| |
| Image Document
|
-
No files of this type available
|
| |
| Video Files
|
-
No files of this type available
|
| |
|
All Documents
|
|
|
| Contact
|
|
-
If you have any questions on the information presented, or require additional report data or attachments, please contact the Report Contact
|
|
|
A screening-level Environmental Flow Needs (EFN) study for the Nicomekl and Serpentine rivers, located in the Fraser Valley, British Columbia.
|
Author: Dan Bewley, Tim Bennett and Jos Beckers
|
|
|
Date Published: Feb 2025
|
Report ID: 63156
|
Audience: Government and Public
|
This report includes determination of Environmental Flow Needs (EFN) for the Nicomekl and Serpentine rivers at key locations and characterization of assigned EFN thresholds. The study is based on an assessment of hydrometric data, fish/aquatic species presence and periodicity, cumulative licensed demand of water, estimated cumulative actual demand and naturalization of flows, and potential impacts to downstream aquatic species and their habitat. Two screening-level EFN methods were evaluated: the BC Modified Tennant and BC Recommended Instream Flow Methods. Generally, the BC Modified Tennant was found to be more conservative than the BC Instream Flow threshold approach for fish bearing streams, and it provides for less water withdrawal in higher flow months. Both methods indicate that from late spring (April) to fall (October) natural flows are comparable to or less than calculated EFN thresholds, and no water withdrawal should occur over this period. The BC-Modified Tennant EFN thresholds are recommended for the Serpentine and Nicomekl rivers. This method provides a more conservative result, relies less on daily flow data, and considers more local fisheries biological (i.e., life-history, bioperiod) and physical information.
|
Report Type
Subject
| |
Region - Lower Mainland |
| |
Water Information - Hydrometric / Hydrology |
| |
Water Information - Water Management |
| |
|
|
|
|
Warranty Disclaimer
This information is provided as a public service by the Government of British Columbia, Box 9411, Victoria, British Columbia, Canada V8W 9V1.
This Web site and all of the information it contains are provided "as is" without warranty of any kind, whether express or implied. All implied warranties, including, without limitation, implied warranties of merchantability, fitness for a particular purpose, and non-infringement, are hereby expressly disclaimed.
Limitation of Liabilities
Under no circumstances will the Government of British Columbia be liable to any person or business entity for any direct, indirect, special, incidental, consequential, or other damages based on any use of this Web site or any other Web site to which this site is linked, including, without limitation, any lost profits, business interruption, or loss of programs or information, even if the Government of British Columbia has been specifically advised of the possibility of such damages.
|
